it does look more durable with all the the added metal but how could that make it faster? but either way, I never had durability issues with my bike chains (including motorcycles), specially when you can adjust for "stretching"
Higher efficiency means more power from the cranks is going to the wheels. But this looks like something primarily for high power situations right now where those tiny gains matter more. Durability wise it will be great for ebikes as they eat up drive trains more so this should reduce cost of ownership in the long term.
